<?php

/**
 * JPGraph v4.0.3
 */

/**
 * // File:		JPGRAPH_THEME.INC.PHP
 * // Description: Class to define graph theme
 * // Created:	 2010-09-29
 * // Ver:		 $Id: jpgraph_theme.inc.php 83 2010-10-01 11:24:19Z atsushi $
 * //
 * // Copyright (c) Asial Corporation. All rights reserved.
 */

namespace lemon\JpGraph\Themes;

use lemon\JpGraph\Graph;
use lemon\JpGraph\Image;
use lemon\JpGraph\Util;

/**
 * @class
 * // Description:
 */
abstract class Theme
{
	protected $color_index;

	public function __construct(){
		$this->color_index = 0;
	}

	abstract public function GetColorList();

	abstract public function ApplyPlot($plot);

	public function SetupPlot($plot){
		if (is_array($plot)) {
			foreach ($plot as $obj) {
				$this->ApplyPlot($obj);
			}
		} else {
			$this->ApplyPlot($plot);
		}
	}

	public function ApplyGraph($graph){
		$this->graph = $graph;
		$method_name = '';
		$graphClass  = explode('\\', get_class($graph));
		$classname   = end($graphClass);

		if ($classname == 'Graph') {
			$method_name = 'SetupGraph';
		} else {
			$method_name = 'Setup' . $classname;
		}

		if (method_exists($this, $method_name)) {
			$this->{$method_name}($graph);
		} else {
			Util\JpGraphError::RaiseL(30001, $method_name, $method_name); //Theme::%s() is not defined. \nPlease make %s(\$graph) function in your theme classs.
		}
	}

	public function PreStrokeApply($graph){
	}

	public function GetThemeColors($num = 30){
		$result_list = [];

		$old_index		 = $this->color_index;
		$this->color_index = 0;
		$count			 = 0;

		$i = 0;
		while (true) {
			for ($j = 0; $j < safe_count($this->GetColorList()); ++$j) {
				if (++$count > $num) {
					break 2;
				}
				$result_list[] = $this->GetNextColor();
			}
			++$i;
		}

		$this->color_index = $old_index;

		return $result_list;
	}

	public function GetNextColor(){
		$color_list = $this->GetColorList();

		$color = null;
		if (isset($color_list[$this->color_index])) {
			$color = $color_list[$this->color_index];
		} else {
			$color_count = safe_count($color_list);
			if ($color_count <= $this->color_index) {
				$color_tmp  = $color_list[$this->color_index % $color_count];
				$brightness = 1.0 - (int) ($this->color_index / $color_count) * 0.2;
				$rgb		= new Image\RGB();
				$color	  = $color_tmp . ':' . $brightness;
				$color	  = $rgb->Color($color);
				$alpha	  = array_pop($color);
				$color	  = $rgb->tryHexConversion($color);
				if ($alpha) {
					$color .= '@' . $alpha;
				}
			}
		}

		++$this->color_index;

		return $color;
	}
} // @class
